Java string separator. .Ext delimiter

.

which is the filename from the file extension separator is a DOS artifact and its 8.3 filename restrictions. On Windows, MacOS X, Linus, etc. This is no longer the case. .

is just any other character (although .

the Linux / Unix master filesystem points to a hidden file).

Windows systems still use the convention (even though you can create a filename with as many periods as you want) as the extension is still used to type and combine files. Linux / Unix / MacOS X tend to rely on magic numbers more than file extensions, although conventions are also used there (like .pl' for Perl files,

.sh` for shell scripts, etc.), but unlike Windows, this is simple agreements that do not matter OS.

So there is basically no concept of a "file separator". In any case, not in a universal sense.